from django.conf import settings
from django.db import models

from pyblackbird_cc.resources.models import Resource


class Product(models.Model):
    name = models.CharField(max_length=255)
    stripe_product_id = models.CharField(max_length=100)


class Price(models.Model):
    product = models.ForeignKey(Product, on_delete=models.CASCADE)
    price = models.IntegerField(default=0)
    stripe_price_id = models.CharField(max_length=100)

    def get_display_price(self):
        return "{0:.2f}".format(self.price / 100)


class ShoppingCart(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    def __str__(self):
        return f"Shopping Cart for {self.user.username}"


class CartItem(models.Model):
    cart = models.ForeignKey(ShoppingCart, on_delete=models.CASCADE, related_name="items")
    resource = models.ForeignKey(Resource, on_delete=models.CASCADE)
    quantity = models.PositiveIntegerField(default=1)
    added_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = ("cart", "resource")

    def __str__(self):
        return f"{self.quantity} of {self.resource.name} in {self.cart.user.username}'s cart"

    def get_total_price(self):
        return self.quantity * self.resource.price


class SubscriptionPlan(models.Model):
    name = models.CharField(max_length=255)
    price = models.DecimalField(max_digits=6, decimal_places=2)
    description = models.TextField()
    allowed_downloads = models.PositiveIntegerField()


class Subscription(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    plan = models.ForeignKey(SubscriptionPlan, on_delete=models.CASCADE)
    is_active = models.BooleanField(default=False)
    start_date = models.DateTimeField(null=True, blank=True)
    end_date = models.DateTimeField(null=True, blank=True)

    def __str__(self):
        return f"Subscription for {self.user.username}"